Once the core tech/structure was ready I started developing a product around the OS PostgREST.
The first thing i did was to implement the GraphQL layer on top and implementing additional features for the commercial version of PostgREST. This GraphQL+REST stack was named "subZero". After this I focused on creating the "service" that would allow customers to easily "spin up" an API for their database. The service itself was build as a subZero backend (eat your own dog food ...) + React frontend and runs in a AWS autoscaling ECS cluster.